Dive computer
![Hydrospace Explorer Trimix and rebreather dive computer. Suunto Mosquito with aftermarket strap and iDive DAN recreational dive computers](/Images/godic/202501/09/3_dive_computers_P31603834508.JPG")
![iDive DAN personal dive computer display showing decompression requirement and other data during a dive The central band shows time to surface from current depth, stop depth and stop time.](/Images/godic/202501/09/IDive_DAN_decompression_requirement_P30506044508.JPG")
![Uwatec Aladin Pro dive computer showing the log of a previous dive](/Images/godic/202501/09/Dive_computer_logbook4508.jpg")
![Technical diver wearing a dive computer on his left wrist during a decompression stop.](/Images/godic/202501/09/TechDiving_NOAA4508.jpg")
A dive computer, personal decompression computer or decompression meter is a device used by an underwater diver to measure the time and depth of a dive so that a safe ascent profile can be calculated and displayed so that the diver can avoid decompression sickness.